Basil Essential Oil - Massaging the stomach with basil essential oil can ease digestive difficulties. Basil essential oil opens and clears the head and can ease headaches, including migraines. It helps overcome the nasal stuffiness of cold and flu. Basil oil can reduce the pain of menstrual cramps and promote menstrual flow. It can be used as a study aid, relieves intellectual fatigue, improves memory and sharpen the mind.